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EDITOR,—We share Jayant S Vaidya and Nigel Sacks's concern about the response rate in our study. Space did not allow us to report the reasons for 10 patients being excluded from the preoperative assessment. Three respondents had the operation done privately; the questionnaires of two respondents were returned by the post office because they had moved; two respondents had their operation before completing the preoperative questionnaire; the …